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ruslelena [56]
3 years ago
14

An object travels at 15 meters in 10 seconds east. What is it’s velocity?

Physics
1 answer:
Juli2301 [7.4K]3 years ago
5 0
A new jxo rib is excellent is.
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A car is travelling at a speed of 90km/h. On seeing baby 20m ahead on the road, the driver jamed on the breakes and it came to r
Thepotemich [5.8K]

Answer:

5m

Explanation:

because if the driver jamed the brakes at 20m and stop at 15m the it took the driver 5m to fully stop

6 0
3 years ago
Choose all the answers that apply. The continents _____. were once connected have always been in the same location are slowly dr
svetoff [14.1K]

Answer: the correct options are

- were once connected

- are slowly drifting

Explanation: The continent is the main land mass of the earth which includes the following:

- Asia, Africa, Europe, Australia, North America, South America, and Antarctica.

These continents were once connected forming a supercontinent called PANGAEA

during the late palaeozoic and early mesozoic eras, millions of years ago.

Alfred Wegener, who is a German meteorologist, in 1912 came up with a hypothesis that the continents are slowly drifting the earth. He called the movement continental drift.

The continents rest on massive slabs of rock called tectonic plates. The plates are always moving and interacting in a process called plate tectonics. In recent studies, through the science of plate tectonics, we where able to understand the mechanism through which continental drift occurs. The mechanism includes:

- processes of seafloor spreading,

- rift valley formation, and

- subduction (where heavier tectonic plates sink beneath lighter ones).

7 0
3 years ago
A proton at location A makes an electricfield E-->1 atlocation B. A different proton, placed atlocation B, experiences a forc
luda_lava [24]

Answer:

Explanation:

 |F-->1| =  E-->1 x charge on proton

= 300 x 1.6 x 10⁻¹⁹

Magnitude of electric force on proton

|F-->1| = 480 x 10⁻¹⁹ N .

Inside lithium nucleus , there are three protons so charge on it

= 3 x 1.6 x 10⁻¹⁹ = 4.8 x 10⁻¹⁹ C .

Magnitude of electric force on lithium nucleus

|F-->Li|  =   E-->1 x charge on lithium nucleus

= 300 x  4.8 x 10⁻¹⁹

= 1440 x 10⁻¹⁹ N .

Electron has same charge as that possessed by proton so charge on electron = 1.6 x 10⁻¹⁹ C

Magnitude of force on electron

|F-->1| =  E-->1 x charge on electron

= 300 x 1.6 x 10⁻¹⁹

=  480 x 10⁻¹⁹ N .

7 0
3 years ago
You lift a 2.0 kg book from a shelf that is 1 m from the floor. What is the potential energy with respect to floor?
sladkih [1.3K]
Potential energy = mgh
Potential energy = 2 x 9.8 x 1
Potential energy 19.6 J
8 0
3 years ago
The coefficient of static friction between a book and the level surface it slides on is 0.65. If the mass of the book is 0.2 kg,
just olya [345]

Answer: 1.274 N minimum force required to slide the book across the surface

Explanation:

Mass of the book = m = 0.2 kg

Normal force acting on the book,N = mg

Coefficient of friction =mu_s = 0.65

Minimum force required to slide the book across the surface= F

F=\mu_s\times N

F=0.65\times 0.2 kg\times 9.8 m/s^2=1.274 N

1.274 N minimum force required to slide the book across the surface

7 0
3 years ago
Read 2 more answers
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